Portable derrick.



R. B. WUODWORTH.

PORTABLE DERRICK.

APPLICATION 11,111) MAR. 9, 1909.

Patented June 7, 1910.

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R. B. WOODWORTH.

PORTABLE DERRICK.

APPLICATION FILED MAR. 9, 1909.

960,474, Patented June 7, 1910.

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R. B. WOODWORTH.

PORTABLE DERRICK.

APPLICATION FILED MAR. 9, I909.

Patented June '7, 1910.

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PORTABLE DERRICK.

APPLICATION FILED MAR. 9, 1909.

Patented June 7, 1910.

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ROBERT B. NOODVT(DP/HEX, OF EITTSBURG, PENNSYLVANIA.

PORTABLE DERRICK.

T all whom it may concern:

Be it known that I, ROBERT B. lVoonwonrn, of Pittsburg, Alleghenycounty, and State of Pennsylvania, have invented a new and usefulImprovement in Portable Derricks, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which Figure 1 is aside elevation of a portion of one form of my improved derrick; Fig. 2is a similar View showing the opposite side of the derrick; Fig. 3 is asectional plan view showing the lower section of the derrick; Fig. 4: isa partial end view; Fig. 5 is a sectional view on the line VV of Fig. 3;Fig. 6 is a similar view on the line VIVI of Fig. 3; Fig. 7 is a detailend View of the sand reel and its supporting connections; Fig. 8 is adetail side elevation of a portion of the structural work of thederrick; Fig. 9 is a sectional detail plan view on the line IX-IX ofFig. 8.

My invention relates to derricks or drilling rigs employed for drillingwells for oil, gas, water or other similar purposes and is designed toprovide a simple, eiiicient and cheap construction which can be erectedat a very moderate cost and which can also be readily taken apartwithout the use of gin poles or scaffolding, to be transported from onepoint to another.

Another object of my invention is to provide a derrick construction inwhich the lower section or panel of the supporting poles or columns arevertically disposed and are secured to sills which are supported on theusual foundations, and in which the vertical columns are connected bymeans of diagonal braces to the supporting columns on which themachinery for drilling, etc, are mounted.

The precise nature of my invention will be best understood by referenceto the accompanying drawings, which will now be described, it beingpremised, however, that various changes can be made in the details ofconstruction and arrangement of parts, without departing from myinvention as described in the appended claim.

In the drawings the numeral 2 designates the sills of the derrick whichare secured together by means of angle plates 3. Supported on thesesills 2 are the vertical portions-l, of the columns, and supported onthe upper ends of these portions are the in- Specification of LettersPatent.

Application filed March 9, 1909.

Patented June '7, 1910. Serial no. 482,257.

' clined portions 5 forming a continuation of the said columns, but atan angle thereto. Supported above the first section 5 of the column isone or more similar members 5. The four columns are held together bymeans of the struts 6, and diagonal braces 7. The end of each strut anddiagonal brace, as well as the ends of two of the column members aresecured to a connecting plate 8. Secured to the struts (3 by means ofangle or clip plates 9 are the ladder sections 10, each section being ofa length substantially eq ual to the length of the column section towhich it is attached.

Secured between one of the struts 6 and the sill 2 of the first sectionare the vertical posts ll, and connected to the posts 11 and thesections a of the columns are the connecting plates 12, to which areconnected the diagonal braces 13, and strut let, the posts forming ashaft support for the bearings of the bull wheel 15 located at one endof the derrick. The other end of the derrick is provided with a similarframe work for supporting the journals of the calf wheel shaft when thecalf wheel is employed with the apparatus. By reference to Fig. 1, itwill be noted that the columns of the lower section at one end thereof,are held together by means of a strut (5 and diagonal braces 7. Theother side of the lower section as shown in Fig. 2 is provided withupright posts 16 which are secured to the strut of the said section, andto the sill below the section. These posts are also connected by meansof the diagonal braces 18 and connecting plates 19 with the columns a.Secured to one of the end sills by means of angle plates 20 arethe'sills 21, which form the base of an A shaped frame 22. This frameforms a support for the journals of the walking beam 23. Mounted onthese sills 21, are the posts 2e and 25, to which are attached thejournals for the shaft of the band wheel 26, and the sand reel 27respectively. Mounted in bearings which are secured to the frame work atthe top of the derrick, are the usual sheaves 28, over which the ropesconnected to the various tools used in drilling the well are passed.

All of the material used in the construction of my improved derrick ispreferably fabricated in the shop, and is shipped ready for erection atthe point at which the derrick is to be used. It will be seen byreference to the accompanying drawings that each of the upper sectionsare composed of four column sections, connecting plates, struts anddiagonal braces. The lower section is composed of four vertical columns,the one side being braced by means of the struts and diagonal braces,while the other three sides are braced by means of vertical posts whichare framed to the column, the strut and the sills by means of connectingplates and diagonal braces. This construction leaves three of the sidesopen to provide free access for the workmen, and at the same timeprovides strong and eficient supports to which the bearmgs or otherparts of the machinery are attached.

By means of the diagonal bracing for the posts 11 the stresses caused bythe various shafts are transmitted directly into the lower sills of thederrick and are transmitted through the sills to the foundation, whilein the old construction these stresses were transmitted to the sillsthrough the parts of the derrick. By the provision of the A shaped framework, the stresses set up by the walking beam are transmitted directlyto the sills and their foundation without passing into the derrickproper.

The advantages of my invention result from the provision of a sectionalderrick, whereby the derrick can readily be erected or dismantledwithout the use of a gin pole or scaffolding. Also by the rovision ofthe diagonal bracing between t e columns and the journal supports forthe shaft, thereby, transmitting the stresses directly to thefoundations, instead of the derrick.

I claim:

A well drilling derrick including sills, substantially vertlcal towermembers rising from the sills, bracing between the front and rear towermembers at one side only of the derrick, the space between thecorresponding members at the opposite side of the tower being open foraccess to the interior of the tower, machinery-supporting posts risingfrom the sills between the front pair and also between the rear pair oftower members, and lacing between the posts and the adjacent towermembers.

In testimony whereof, I have hereunto set my hand.

ROBERT B. WVOODWVORTH.

Witnesses:

GERTRUDE SGHOTTE, ROBERT A. MARBLE.

